Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bbd9605e808e54…

MALICIOUS

PDF

93.3 KB Created: 2021-03-17 06:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bb66c7e197017295fc997656d55d1a0f SHA-1: 26871a794dc1eac0033dd9878c2d0de93473c890 SHA-256: 64bbd9605e808e54e3fc3de369b32ebab683d851db0bddafe80ba22701b8b5ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, with a primary suspicious URL pointing to 'jumiwimov.ru'. The document body, though heavily obfuscated, suggests a lure related to a "Where's waldo scary pop up", likely intended to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/strik?utm_term=where%2527s+waldo+scary+pop+up PDF link annotation
    • http://zesisoxesevi.22web.org/what_are_the_methods_and_techniques_of_language_teaching.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/who_makes_cavaliere_range_hoods.pdfIn PDF document text
    • https://seranogi.weebly.com/uploads/1/3/4/2/134265977/buxotowekema_wasik.pdfIn PDF document text
    • https://vevurufutugar.weebly.com/uploads/1/3/4/7/134737477/026480.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/shark_steam_pocket_mop_stopped_working.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/mavasoxotanego.pdfIn PDF document text
    • http://xatefukukisebu.22web.org/6174783628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/307f3d8f-24e4-484e-9d6f-45f9ce2da6da/swann_security_camera_reviews_2019.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_e37a59e191664b6ca336ed37bc4f6dde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legenapi/pemul.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/tuxevolojababomobuv.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/jejibofuxalikafopafutami.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/4879233901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ade5306-82f3-46a2-a7a1-6a2bfa388a6b/zabovivu.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_f090d6daf7054c2b91a14447cf981979.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutisigila/how_to_change_a_range_hood_light_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c344752f-9472-46de-b5b1-35b4ecf68114/36953984050.pdfIn PDF document text
    • http://xasiruzate.rf.gd/how_do_you_eat_healthy_on_a_small_budget.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12678 5400 bytes
SHA-256: 1f869f390f9e94977c0c0ced15e7bb4727a056b8c0600ca83fb3db46793859b3
font_01_sfnt_off000138f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F2 14616 bytes
SHA-256: abb65a77c48d095271672482391340e27971e8c5031ceab2f824b89813c7a041

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